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Samsung Galaxy S21 Ultra vs Samsung Galaxy A51 comparison

 Compare Samsung Galaxy S21 Ultra
Samsung Galaxy S21 Ultra
Compare Samsung Galaxy A51
Samsung Galaxy A51
ratings
Overall NDTV RatingRead ReviewRead Review
Design Rating
Display Rating
Software Rating
Performance Rating
Battery Life Rating
Camera Rating
Value for Money Rating
key specs
Display6.80-inch6.50-inch
ProcessorSamsung Exynos 2100-
Front Camera40-megapixel 32-megapixel
Rear Camera108-megapixel + 12-megapixel + 10-megapixel + 10-megapixel 48-megapixel + 12-megapixel + 5-megapixel + 5-megapixel
RAM12GB, 16GB6GB
Storage128GB, 256GB, 512GB128GB
Battery Capacity5000mAh4000mAh
OSAndroid 11Android 10
Resolution1440x3220 pixels1080x2400 pixels
general
BrandSamsungSamsung
ModelGalaxy S21 UltraGalaxy A51
Release dateJanuary 14, 2021January 1, 2020
Form factorTouchscreenTouchscreen
Dimensions (mm)165.10 x 75.60 x 8.90158.50 x 73.60 x 7.90
Weight (g)228.00172.00
IP ratingIP68-
Battery capacity (mAh)50004000
Fast chargingProprietaryProprietary
Wireless chargingYes-
ColoursPhantom Titanium, Phantom Navy, Phantom BrownPrism Crush Blue, Prism Crush Black, Prism Crush Pink, Prism Crush White
Launched in India-Yes
display
Screen size (inches)6.806.50
TouchscreenYesYes
Resolution1440x3220 pixels1080x2400 pixels
Protection typeGorilla Glass-
Pixels per inch (PPI)515-
hardware
Processor2.2GHz octa-core (3x2.8GHz + 4x2.2GHz + 1x2.9GHz)-
Processor makeSamsung Exynos 2100Samsung Exynos 9611
RAM12GB, 16GB6GB
Internal storage128GB, 256GB, 512GB128GB
Expandable storage-Yes
Expandable storage type-microSD
Expandable storage up to (GB)-512
Dedicated microSD slot-Yes
camera
Rear camera108-megapixel (f/1.8, 0.8-micron) + 12-megapixel (f/2.2, 1.4-micron) + 10-megapixel (f/2.4, 1.22-micron) + 10-megapixel (f/4.9, 1.22-micron)48-megapixel (f/2.0) + 12-megapixel (f/2.2) + 5-megapixel (f/2.2) + 5-megapixel (f/2.4)
Rear autofocusLaser autofocus-
Rear flashYes-
Front camera40-megapixel (f/2.2, 0.7-micron)32-megapixel (f/2.2)
software
Operating systemAndroid 11Android 10
SkinOne UI 3.1One UI 2.0
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 a/b/g/n/ac/ax802.11 ac
GPSYesYes
BluetoothYes, v 5.00Yes, v 5.00
NFCYesYes
USB Type-CYesYes
Number of SIMs22
USB OTG-Yes
Headphones-3.5mm
FM-Yes
Wi-Fi Direct-Yes
Active 4G on both SIM cards-Yes
sim 1
SIM TypeNano-SIMNano-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
5GYes-
sim 2
SIM TypeNano-SIMNano-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
5GYes-
sensors
Face unlockYesYes
In-Display Fingerprint SensorYesYes
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
GyroscopeYesYes
BarometerYes-
Fingerprint sensor-Yes

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